Adjustable seat



Jan. 28, 1941. i A; RADERS 2,229,769

ADJUSTABLE SEAT A iiomeys v 4 .79 Y ja'gifl.

Inventor Jan. 28, 1941.

A. F. RADERS ADJUSTABLE SEAT Filed Dec. 26, 1939 3 Sheets-Sheet 2 Aiiorneys Inventor Jan. 28, 1941. A. F. RADERS ADJUSTABLE SEAT sSheets-Shet 5 Filed Dec. '26, 1939 A iiomeys Patented Jan. 28, 1941s'r'r" This invention relates to an adjustable seat which is mainlydesigned for locomotive engineers, the general object of the inventionbeing to provide a seat having a depending member matically and properlytake the weight of the 10 person occupying the seat in accordance withthe weight, so that the seat is a resilient one and the spring meansadjust themselves to the amount of the weight of the occupant of thechair.

Another object of the invention is. to provide means for adjusting thevertical position of the spring which controls the height of the seat ofthe chair from the base and also to provide novel footrest means.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:

Figur'el is a side elevationalview of the improved chair. Figure 2 is afront view thereof.

Figure 3 is a vertical sectional view'through the lower part of thesupporting means for the chair.

. Figure 4 is a section on the line 4-4 of Fig-.

ure 1.

Figure 5 is a section on the line 5-5 of Fig- ,ure 2.

Figure 6 isa section on the line '66 of Figure 1.

Figure 7 is a section on the line '|-'l of Figure 3.

Figure 8 is a top plan view of the conical base member. s

Figure 9 is a top plan view of the footrest supporting means.

Figure 10 is a view partly sectio of the upper disk. a K

Figure 11 is a similar view of the lower disk.

In these views the numeral l indicates a base plate to which isconnected by welding or thelike the lower end of a tubular member 2 andalso secured to the plate l within the tubular member 2 is a conicalbase 3 which has a centrally ar-' ranged hole 4 therein for the passageof a ver-' tically arranged screw shaft 5, the lowerend of whichis-supported on the base plate I within the member 3 bythe anti-frictionmeans 5. A beveled gear 1 is connected to the lower end of the shaft 5as shown at 8 and a beveled gear 9 is also'looated in the space formedby the member 3 and engages the gear I and is attached to a socketed hub10 rotatably arranged in a bearing part II formed on the member 3 asshown more clearly in Figure 8. The socket in the member In is ofnon-circular shape in cross section to receive the non-circular part ofa shaft H which has a crank outer end I3 acting as a handle and saidshaft is journaled in an upright bracket l4 attached to an outer part ofthe plate I. A U- shaped clip l5 (see Figure 7) is fastened to a part ofthe shaft l2 by a bolt l6 engaging a flat part of the shaft and saidclip is locatedadiacent the bracket It to removably hold the shaft go 12in position with its non-circular innerend engaging the socket in themember ID. By removing the clip the shaft can be withdrawn. As will beseen this arrangement provides means for rotating the screw shaft 5 toadjust vertically a disk It which has an internally threaded hub I9(seeFigure 11) through which the threaded part of the shaft passes. Theupper face of this disk I8 is provided with-three annular grooves 20,the outer one of which. receives a long and wide coil spring 2|, theintermediate one of which. receives a shorter and narrower coil spring22 while the inner one receives a. short and still narrower coil spring23, all the springs tapering upwardly as shown in Figure 3.

A tubular member 24 has sliding movement in the member 2 and a disk 25extends across the tubular member 24 and is welded thereto as shown at26 and the hub 21 of this disk 25 (see Figure 10) is plain so that ithas a sliding movement on the shaft 5. The lower face of this disk 25 isprovided with three annular grooves 28 for receiving the upper ends ofthe springs though when the seat is unoccupied only the upper end of thelong outer spring 2| will engage the disk 25.

Vertically arranged ribs 30 are connected with the exterior part of" themember 24 and are spaced apart and extend into the member 2. An arcuatevertically arranged plate 3| is attached to the inner circumference ofthe tubular member 2 and extends between the space between a pair ofthese ribs 30 and acts to prevent rotary movement of the tubular member24 in the memher 2. A notch 33 is for'medin the lower end of i themember 24 to pass over the shaft [2 when the member 24 nears the lowerend of its downward movement.

A seat base 35 is secured to the upper end of the tubular member 24 anda cushion 36 is supported by this base 35, this cushion preferably beingformed of baked sponge rubber covered with a suitable covering, as shownin Figure 5.

The back plate of the seat is shown at 31 and the cushion part 38carried thereby contains the springs 38 as also shown in Figure 5.

A hole 40 is formed in the lower end of the outer tubular member 2 forthe escape of any moisture which may collect in the member 2.

Upwardly and rearwardly sloping uprights 4i are secured in spacedrelation to the front of the base plate I and these uprights have thelongitudinally extending slots 42 therein, the front walls of which areformed with the spaced notches 43. The footrest 44 includes a plate 45fastened to the angle members 46 which project rearwardly from the plateand their vertical flanges have the outwardly extending projections 41thereon which fit in the slot 42 and adapted to engage the notches 43 tohold the footrest in adjusted position. As shown in Figure 1 thefootrest can be tilted upwardly and rearwardly so as to space the rearends of the members 46 from the inwardly extending flanges 4| of theuprights 4|, see Figure 3, and then the projections 41 can be movedalong the slots 42 to place the projections 41 in the desired pair ofnotches 43. Then by tilting the footrest downwardly the said footrestwill be held in adjusted position in the uprights 4I-.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent,

It is to be understood thatchanges may be made in the constructionand inthe combination and arrangement of the several parts provided that suchchangesfall within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A seat of the class described comprising a tubular upright basemember, a second tubular member slidably arranged in the base member, aseat connected with the upper end of the sec- 50 0nd tubular member, atransverse member in comprising a base plate, a tubular member ateachtubular member, a plurality of springs having their lower ends engagingthe transverse member in the first tubular member, said springs being ofdifferent lengths and of difierent diameters with the longest springengaging the trans- 5 verse member of the second tubular member, andmeans for raising and lowering the transverse member in the tubular basemember.

2. A seat of the class described comprising a tubular upright basemember, a second tubular 10 member slidably arranged in the base member,

a seat connected with the upper end of the second tubular member, atransverse member in each tubular member, a plurality of springs havingtheir lower ends engaging the transverse mem- 15 ber in the firsttubular member, said springs being of different lengths and of difierentdiameters with the longest spring engaging the transtached thereto atits lower end, a seat, a tubular 30 member having its upper endconnected with the seat and the second-mentioned tubular member having asliding fit in the first tubular member, means for preventing rotarymovement of the second tubular member in the first tubular 35 memberwhile permitting vertical movement thereof, a plurality of spring meanssupported in the first tubular member, said springs being of differentlengths, a transverse member in the second tubular member for engagingthe upper 40 ends of said springs, a seat for the spring means locatedin the first tubular member and means for adjusting the spring seatvertically to raise and lower the tubular member which carries thefirst-mentioned seat, said means including a part 45 extending through aside portion of the first tubular member whereby the spring seat can beadjusted from the exterior of said tubular member.

ALBERT F. RADERS.

